For these examples, we will use several of the
techniques covered in part A of this module.

i) Example 1: Graph
the function .
For this function we will use the ZDecimal
and ZStandard windows. Enter the function by accessing the
button and entering the function. Then enter
and then 4 for ZDecimal. To graph using ZStandard, enter
and then 6.

ZOOM Menu

Enter the
function.

Use ZOOM 4.

Use ZOOM 6.

You can see that either one of these windows
is good enough to use. However, the ZDecimal window is the better one to
use since it is a friendly window and the TRACE
will move in increments of 0.1.

ii) Example 2:
Graph the function
using ZOOM 4 and ZOOM 6.

Enter the function.

Using ZOOM 4.

Using ZOOM 6.

Since these windows do not give a good graph,
use the TABLE to find the window.
Notice in the graphs above that the function crosses the x-axis between
-2 and -1 and around 5. Access the TABLE window and enter several values
of X between -4 and 8 to determine the appropriate Y values. Once you have
a good idea of the values of the function, set the window to fit the graph.
You may need to try more than one window to get a good picture, but the
TABLE will help you find a good starting point.